This instrument is a specialized device developed in accordance with national regulations for measuring the resistance of conductive shoes. It has the characteristics of small size, light weight, and high accuracy. The instrument adopts a touch screen integrated design, with simple operation and one click testing. It is equipped with a micro printer, which can print in real-time or query.
The Portable Relay Protection Tester is widely used in the commissioning, maintenance, and troubleshooting of power system protection and automation equipment. Its precision output, flexible test modes, and rugged handheld design make it an essential tool in a variety of electrical engineering environments:
Substation Commissioning & Maintenance
Perform on-site testing of protective relays, including overcurrent, distance, differential, and directional relays, ensuring correct settings and reliable operation before energization.
Power Generation Plants
Verify generator protection schemes such as differential protection, loss-of-excitation, reverse power, and low/high frequency tripping functions.
Transmission and Distribution Networks
Test underfrequency load shedding (UFLS) relays, auto-reclosing (AR) logic, and synchronization check (sync-check) devices to maintain grid stability and restore service efficiently after faults.
Industrial Power Systems
Validate motor protection relays, transformer differential relays with harmonic restraint, and feeder protection in manufacturing, mining, and petrochemical facilities.
Railway & Traction Power Systems
Conduct protection tests on AC/DC traction substations where compact, battery-powered equipment is required for field access.
Renewable Energy Installations
Commission protection systems in solar PV plants and wind farms, particularly for islanding detection, anti-islanding protection, and grid-synchronization verification.
Relay Manufacturing & Calibration Labs
Use as a portable reference source for factory acceptance tests (FAT), R&D validation, and periodic calibration of protection IEDs.
Training & Education
Support hands-on training for engineers and technicians in relay behavior, fault simulation, and protection logic analysis.
With its comprehensive test functions—including manual output, state sequencing, harmonics injection, and millisecond-level timing—the tester ensures accurate evaluation of both conventional electromechanical relays and modern digital protection devices in diverse operational scenarios.
This device is mainly suitable for testing the breakdown strength and voltage resistance of solid insulation materials (such as plastics, rubber, laminated materials, films, resins, mica, ceramics, glass, insulation paints, and other insulation materials and components) under power frequency voltage or DC voltage. Widely used in the design and manufacturing of high-voltage breakdown tests in the power electronics industry, the Ministry of Machinery Industry, research institutes, military research, and insulation material production units.
The KDJ5-AMI Safety Helmet Impact and Penetration Tester is widely used in various industries and research institutions to ensure the safety and reliability of protective headgear. Below are key application scenarios:
Construction Industry
On construction sites, this tester is essential for quality control of safety helmets used by workers. It enables on-site or laboratory-based inspection of newly procured helmets, verifying their ability to absorb impact energy and resist penetration from falling objects, thus ensuring compliance with national safety standards such as GB/T 2811-2007 and GB/T 2812-2006.
Mining and Tunneling Operations
In underground mining and tunneling environments where the risk of rock falls and sharp object impacts is high, the tester is used to evaluate the protective performance of safety helmets under extreme conditions, ensuring that head protection equipment meets rigorous safety requirements.
Power and Electrical Utilities
Utility companies use this equipment to test helmets designed for electrical work, ensuring they provide adequate impact and penetration resistance while maintaining compliance with industry-specific safety protocols.
Occupational Safety Laboratories
Governmental and third-party testing laboratories employ the KDJ5-AMI tester for certification, routine inspection, and comparative analysis of safety helmets from different manufacturers. Its high-precision sensors and automated data processing ensure reliable and repeatable test results.
Research and Development
Helmet manufacturers and material scientists use the tester during the product development phase to evaluate new materials, designs, and structural improvements. The accurate force measurement and peak value recording support innovation in lightweight, high-strength protective headgear.
Industrial Manufacturing
In factories and industrial plants, especially those with overhead operations or heavy machinery, regular testing of safety helmets ensures ongoing worker protection and adherence to occupational health and safety regulations.
Emergency Response and Rescue Services
Firefighters, rescue workers, and other emergency personnel rely on high-performance helmets. This tester helps verify that their helmets can withstand extreme mechanical stress during operations.
With its robust design, automated control system, and compliance with international testing standards, the KDJ5-AMI Safety Helmet Impact and Penetration Tester serves as a critical tool in safeguarding human life across high-risk industries.
In a busy urban substation, maintenance engineers are preparing to synchronize two 10kV power lines after routine upgrades. To ensure safe and accurate phase alignment, they deploy the KDZD3540 Wireless High-Voltage Phasing Detector specifically designed for switchgear applications.
Standing at a safe distance outside the metal-enclosed switchgear (MNS type), the technicians place the compact detectors near the A, B, and C phase conductors inside the cabinet without any direct contact. The wireless system transmits real-time phase data to the main receiver unit, which features a 3.5-inch color LCD screen. Within seconds, the device simultaneously displays the phase angles, voltage levels, and sequence information for all three phases.
Thanks to its clear digital display and voice guidance—announcing "Same Phase" or "Different Phase"—the team quickly confirms correct phasing before closing the circuit breaker. The built-in data storage records the results for documentation, and the wireless range of up to 30 meters allows flexible positioning even in tight or hazardous environments.
This non-contact, wireless solution minimizes arc flash risks, enhances operational efficiency, and ensures compliance with international safety standards such as IEC 61481 and DL/T 971—2017, making it ideal for live-line work in modern power distribution systems
KDHG-HT All-in-One Transformer Tester is designed for versatile use in diverse environments, including:
Power System Maintenance
Factory Acceptance Testing
Research & Development Laboratories
Field Commissioning
Educational & Training Institutions
The KDJB-1200Y Six-Phase Relay Protection Tester is ideally suited for use in power substations, power plants, and electrical testing laboratories. It is widely applied in commissioning, routine maintenance, and troubleshooting of modern digital and electromechanical protection relays in high-voltage and medium-voltage power systems. The instrument performs reliably in field environments with variable temperature and humidity, making it a trusted tool for protection engineers during system upgrades, relay calibration, and fault simulation tests. Its robust design and portable size also make it effective in mobile testing units and on-site service operations.
The KDDT-10A Ground Conductance Tester is designed for a wide range of environments where grounding system integrity and safety are critical:
Industrial Facilities:
Power Systems:
Building Infrastructure:
Research & Development:
Outdoor & Remote Sites:
Environmental Tolerance:
The KDZD-JC Softening Breakdown Tester is specifically designed for evaluating the insulation performance of enameled round wires, film-wrapped round wires, and flat wires with a conductor diameter of 0.020mm to 3.000mm or flat wires up to 10mm×2mm in size after thermal softening. It complies with international and national standards such as GB/T4074.6-2008/IEC 60851-6 and JB/T4279.8-2008, making it suitable for quality control in wire and cable production, R&D validation of new materials or processes, and standard compliance testing. The device automates critical functions including temperature measurement, control, and adjustment, as well as the application of load and voltage to the sample, with automatic detection of breakdown events through precise current thresholds (5±0.5mA for fixed-temperature methods and 20±1mA for rising-temperature methods). Its capabilities span fixed-temperature testing (heating to a target temperature before evaluation) and rising-temperature testing (direct heating with voltages of 100V±10V or 155V±10V), ensuring reliable data for assessing insulation integrity under thermal stress. The tester’s compact design (450×380×500mm) and automated workflow, including preheating, load application, and real-time monitoring, make it ideal for laboratories, manufacturing facilities, and research institutions requiring high-precision, repeatable results in compliance with rigorous industry standards.
The KDXB(L)-100kVA/100kV Mobile High-Voltage Withstand Test System is specifically designed for on-site insulation testing of high-voltage systems in the rail transit industry. It is widely used in maintenance depots and manufacturing facilities for high-speed trains, EMUs (Electric Multiple Units), and urban rail vehicles.
In a typical application, the mobile test unit is wheeled directly to the train maintenance bay. Engineers connect the high-voltage output terminal of the system to the train’s main high-voltage power cable, while grounding the return path securely. The capacitive load of the cable (up to 0.031μF) is automatically recognized by the system, which then initiates an automatic resonant tuning process to achieve optimal test conditions at 50Hz.
Using the intuitive touch-screen interface on the control trolley, operators set the required test voltage—up to 100kV AC—and duration (typically 60 minutes). Once initiated, the system automatically ramps up the voltage, monitors real-time parameters (high-voltage, current, frequency), and maintains a stable output with less than 1.0% voltage fluctuation. If any abnormality occurs—such as flashover, overcurrent, or overvoltage—the system immediately triggers protective shutdown mechanisms, ensuring safety for both personnel and equipment.
After the test is completed, the system automatically reduces the voltage and cuts off the power supply. Test results, including peak voltage, duration, and any fault events, are saved internally and can be printed or exported via USB for documentation and compliance reporting.
Thanks to its modular, split-body design, the system is easy to transport and assemble on-site. The rugged construction, integrated casters, and shock-absorbing mounts make it ideal for industrial environments. Meeting international standards such as GB/T 16927 and IEC 60270, this mobile test solution provides a reliable, efficient, and safe method for performing high-voltage withstand tests in real-world conditions.
The applications covered include routine cable testing according to IEC, ANSI/IEEE, and other national standards
The application scenarios of the "KDZR-ZH" distribution transformer direct resistance ratio comprehensive tester mainly focus on the maintenance, repair, and troubleshooting of the power system. Specific application scenarios include but are not limited to the following aspects:
Regular inspection of distribution transformers: For operating distribution transformers, regular DC resistance and transformation ratio tests can help detect equipment aging and operational status, ensuring their normal operation.
Acceptance testing after new installation or maintenance: After the installation or maintenance of a new distribution transformer is completed, the use of this tester can verify whether the equipment is correctly installed and whether the maintenance is effective, ensuring that the equipment can be safely connected to the power grid for operation.
Troubleshooting: When a distribution transformer malfunctions, direct current resistance and transformation ratio tests can quickly locate the problem, such as winding short circuits, open circuits, etc., to guide the repair work.
Expansion or renovation of power system: When expanding or renovating the power system, it is necessary to test the newly added distribution transformers to ensure that they meet the system requirements and can seamlessly integrate with the existing system.
On site portable testing requirements: Due to the use of large capacity lithium batteries for power supply, this tester is particularly suitable for on-site environments without stable external power supply, such as remote distribution stations or outdoor temporary electrical facilities for testing.
Application scenario example:
Power equipment testing: used to measure the dielectric loss value of transformer oil paper insulation system and evaluate the degree of insulation aging.
Factory test: Verify whether the insulation performance of transformer bushing, winding and other components meets the standards (such as IEC 60422).
Preventive maintenance: Predict potential insulation failure risks by regularly measuring tan δ values.
Application scenarios and advantages
Typical application areas
Power system: Testing the grounding network of substations and transmission and distribution lines to ensure the safe operation of equipment.
Communication base station: Grounding resistance testing for iron towers and computer rooms to ensure signal stability.
Industrial facilities: maintenance of grounding systems in oil fields and factories to prevent lightning strikes.
New energy: Grounding performance evaluation of photovoltaic power plants and wind farms.
core competitiveness
Multi functional integration: One machine for multiple uses, reducing the burden of carrying equipment and lowering procurement costs.
High precision and anti-interference: Adapt to complex electromagnetic environments through pole changing and filtering techniques.
Intelligent data management: Bluetooth/USB real-time transmission, cloud analysis function, to improve operation and maintenance efficiency.
User friendliness: Simple two-wire method and double clamp method simplify the wiring process, suitable for non professionals to quickly get started.
Electrical fault diagnosis:
Detect overheating issues in electrical equipment such as transformers, switchgear, and cable joints, and identify potential fault points in advance (such as loose connections and insulation aging).
In power inspection, thermal imaging is used to quickly locate high-temperature abnormal areas, avoiding equipment damage or power outages.
Building insulation and heat leakage analysis:
Detect the thermal insulation performance of walls, roofs, doors and windows, and identify areas with air leakage, moisture, or insulation material failure.
Analyze the thermal distribution uniformity of heating systems (such as underfloor heating and air conditioning) and optimize energy efficiency.
Pipeline and HVAC system testing:
Identify leakage points or insulation damage in water and steam pipelines.
Check the heat exchange efficiency of the HVAC system to improve operational stability.
